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  • How do Gravitons work? as compared to photons - Physics Stack Exchange
    In the analogy between photons and gravitons, (real) photons make up electromagnetic waves such as light and radio waves; and (real) gravitons make up gravitational waves such as are detected at LIGO Just as photons are emitted by accelerating charges, gravitons are emitted by accelerating masses, at least in principle In practice we do not have a complete quantum theory of gravity, so the
  • Mathematically, what is a graviton? - Physics Stack Exchange
    What is a graviton? Similarly how a photon is a particle you get after quantizing free electromagnetism, a gluon is a particle you get after quantizing linearized Yang-Mills; you get a graviton after quantizing linearized gravity
  • quantum gravity - What do gravitons do? - Physics Stack Exchange
    You are basically asking how forces work in quantum field theory, because the graviton is the force carrier in a QFT description of gravity Have a read through this article by Matt Strassler It gives a good description of what virtual particles like gravitons are, and how they work
  • quantum gravity - What is a graviton? - Physics Stack Exchange
    A graviton is a theorised particle (specifically a boson) It is said to be its own antiparticle It has a special role in general relativity (being that the science is all about gravitation and the warping of space time) In relation to your mention of string theory, it is said to be a closed string with a very low-frequency vibration Closed strings are loops which vibrate at different
  • Why is the spin of the graviton 2? - Physics Stack Exchange
    The main difference is that gravity is always attractive while electromagnetic force is not A photon intermediating electromagnetic force has spin 1 while graviton should have spin 2 What is a reason for different spin values of photon and graviton?
  • How can the graviton be both massless and self-interacting?
    Gravitons and photons have zero rest mass, but what gravitons couple to, is energy and momentum, and gravitons and photons carry energy and momentum, so they do interact with gravitons Energy and momentum is the charge of gravity Because all energy couple with gravitons, that is why the rest mass energy, the part that dominates at low speeds, appeared in Newtonian gravity
  • Why you need a graviton when you have the Higgs boson?
    Perhaps we still need to have a (spin 2) graviton, but if we do, even its quantum spin must be relative to the only invariant spin state, which is the zero spin state of Higgs Otherwise, there is no mechanism for matter to even begin to fall toward other gravitating masses under a boson mediated force pair we call gravity
  • Is there any empirical evidence for the existence of the graviton?
    Is gravitation hence subject to the existence of an analogous fundamental particle, the hypothetical graviton? If so, what, if any, empirical evidence suggests it exists?
  • If gravity is a pseudoforce in general relativity, then why is a . . .
    2) A graviton is necessary since we believe graviton excitations, maybe Wheeler's space-time foam in some form or alike, must dominate the description of very dense objects (microscopic black holes, the beginning of the time, and other similar examples as space-time singularities) However, graviton scattering behaves badly in general relativity





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